It is the latest in a line of events that the Union have organised since forming at the end of last year.
"We have decided to organise a fun night out at the races for our members enjoyment," said an Iron Union spokesperson.
"A night at Doncaster's Meadow Court greyhound stadium has been proposed and we thought it would be fun to take a few Iron Union members for a social night out on Tuesday April 11.
"The cost of the evening will be £16.00, for that you will get transport to the stadium, plus entry, a carvery meal and hopefully also win a few quid.
"We think this is good value and hope as many Union members as possible want to come along."
For more details, visit the Union's website.